Over in the Learning Times Green Room (TM), a discussion about "'Lurking' in online classes" continues. Whether I like the connotations of "'lurking'" or not, that Green Room Comments space reflects neither class- or course-based organizational principles. So I have no qualms about coming and going there as time and interest permit.
Of particular interest, I find, in a return visit and review of recent comments, is an analogy of participation in online discussions as a form of respiration, inhaling and exhaling. I had glossed over that anatomical analogy in hasty previous readings. After another long, deep inhalation there, I exhale here as previously (Learner-centered approaches challenge standardization).
Among those Green Room Comments also is speculation that "sustainable discussion" might be a new turn of phrase. However, I find that it has been around since at least 1996 (Google search) for discussion of sustainable environmental practices.
Yet it seems that there is room for reappropriation and redefinition of the phrase "sustainable discussion" with respect to online learning environments. So, why not give it another go, here or there - making it some sort of "moveable feast"?